Pixel array, pixel structure, and driving method of a pixel structure

ABSTRACT

A pixel array, a pixel structure, and a driving method of a pixel structure are provided. The pixel structure includes a first scan line, a second scan line, a first common electrode line, a data line, a first active device, a second device, a first pixel electrode, and a second pixel electrode. The data line is intersected with the first scan line and the second scan line. The first active device is driven by the first scan line and connected to the data line. The second active device is driven by the second scan line and connected to the first common electrode line. The first pixel electrode is electrically connected to the data line through the first active device. The second pixel electrode is electrically connected to the data line through the first active device and electrically connected to the first common electrode line through the second active device.

CROSS-REFERENCE TO RELATED APPLICATION

This application claims the priority benefit of Taiwan applicationserial no. 100112817, filed on Apr. 13, 2011. The entirety of theabove-mentioned patent application is hereby incorporated by referenceherein and made a part of this specification.

BACKGROUND OF THE INVENTION

1. Technical Field

The disclosure relates to a pixel array, a pixel structure and a drivingmethod thereof, and particularly to a pixel structure capable ofperforming a three-dimensional (3D) display mode, a pixel array havingthe pixel structure, and a driving method of the pixel structure.

2. Description of Related Art

The display methods of 3D images have been commercialized and introducedinto the products with the vigorous development of the displays. It isconsidered that the 3D display devices become an important developingtrend of the displays in the next generation. The 3D display devices aregradually required in the markets of various fields such as medicalfield, exhibition field, commercial field, education field, militaryfield, design field, and the like.

Nevertheless, the problem for commercializing the 3D displays into theproducts lies in that the image quality thereof, such as the viewingangles, the numbers of the users capable of watching the 3D images, andthe like, which fails to satisfy the demands of the user as well as the2D displays. Particularly, the serious problem negatively influencingthe 3D display effect is the occurrence of cross-talk between stereoimages.

FIG. 1 schematically illustrates the 3D display technique. Referring toFIG. 1, the pixels 110 in the display 100 are generally divided intoleft-eye pixels 112 and right eye pixels 114 based on the 3D displaytechnique, wherein the images displayed by the left-eye pixels 112 andthe right-eye pixels 114 are different. The left eye L and the right eye(not shown) of a user can respectively receives the images displayed bythe left-eye pixels 112 and the images displayed by the right-eye pixels114, and then construct a 3D image in his or her brain.

However, the left-eye pixels 112 and the right-eye pixels 114 areadjacent to each other. Inevitably, in addition to receiving the imagesdisplayed by the left-eye pixels 112, the left eye L can also receivethe images displayed by the right-eye pixels 114, which causes thephenomenon of cross talk between stereo images. For preventing thephenomenon of cross talk between stereo images, a light shieldingpattern 120 is usually disposed between the left-eye pixels 112 and theright-eye pixels 114. It is noted that the larger the shielding area ofthe light shielding pattern 120, the smaller the display area of thedisplay 100. Accordingly, the display aperture of the display 100 issignificantly restricted when performing the two-dimensional (2D)display mode. That is to say, for achieving desirable display quality inthe 3D display mode, the display quality of the display 100 in the 2Ddisplay mode must be sacrificed.

SUMMARY OF DISCLOSURE

The disclosure provides a pixel structure having two pixel electrodes,wherein the two pixel electrodes both display the images in the 2Ddisplay mode and one of the pixel electrodes can display a dark imagethrough the control of the active device in the 3D display mode forserving as a light shielding pattern, such that great display effect canbe achieved.

The disclosure provides a driving method of a pixel structure, whereinthe active devices are turned on according to different time series sothat one of the pixel electrodes in the pixel structure can selectivelydisplay a dark image or a predetermined gray level, thereby the problemof cross talk between stereo images can be eliminated.

The disclosure provides a pixel array including a plurality of pixelstructures arranged in an array and each pixel structure has three pixelelectrodes, such that the three pixel electrodes can display at leasttwo image brightness in the 2D display mode, and at least one of thethree pixel electrodes can display a dark image while the other twodisplay different brightness in the 3D display mode, thereby the displayquality in the 3D display mode can be enhanced.

The disclosure directs to a pixel structure including a first scan line,a second scan line, a first common electrode line, a data line, a firstactive device, a second active device, a first pixel electrode, and asecond pixel electrode. The data line intersects with the first and thesecond scan lines. The first active device is driven by the first scanline and electrically connected to the data line. The second activedevice is driven by the second scan line and electrically connected tothe first common electrode line. The first pixel electrode iselectrically connected to the data line through the first active device.The second pixel electrode is electrically connected to the data linethrough the first active device and electrically connected to the firstcommon electrode line through the second active device.

The disclosure also directs to a driving method of a pixel structure.The pixel structure includes a first scan line, a second scan line, afirst common electrode line, a data line, a first active device, asecond active device, a first pixel electrode, and a second pixelelectrode. The data line intersects with the first and the second scanlines. The first active device is driven by the first scan line andelectrically connected to the data line. The second active device isdriven by the second scan line and electrically connected to the firstcommon electrode line. The first pixel electrode is electricallyconnected to the data line through the first active device. The secondpixel electrode is electrically connected to the data line through thefirst active device and electrically connected to the first commonelectrode line through the second active device. The driving method ofthe pixel structure includes: in a 2D display mode, turning on the firstactive device through the first scan line such that a display voltage isapplied to the first pixel electrode and the second pixel electrode fromthe data line; and in a 3D display mode, turning on the first activedevice through the first scan line such that the first display voltageis applied to the first pixel electrode and the second pixel electrodefrom the data line, and subsequently turning on the second active devicethrough the second scan line such that a common voltage is applied tothe second pixel electrode from the first common electrode line.

The disclosure further directs to a driving method of a pixel structure.The pixel structure includes a first scan line, a second scan line, adata line, a first active device, a second active device, a first pixelelectrode, and a second pixel electrode. The data line intersects withthe first and the second scan lines. The first active device is drivenby the first scan line and electrically connected to the data line. Thesecond active device is driven by the second scan line and electricallyconnected to the data line. The first pixel electrode is electricallyconnected to the data line through the first active device. The secondpixel electrode is electrically connected to the data line through thesecond active device. The driving method of the pixel structureincludes: in a 2D display mode, simultaneously turning on the firstactive device and the second active device through the first scan lineand the second scan line such that a display voltage is applied to thefirst pixel electrode and the second pixel electrode from the data line;and in a three-dimensional (3D) display mode, turning on the firstactive device and the second active device through the first scan lineand the second scan line at an n^(th) frame time such that the displayvoltage is applied to the first pixel electrode and the scone pixelelectrode from the data line, and turning on one of the first activedevice and the second active device through one of the first scan lineand the second scan line at an (n+1)^(th) frame time such that a darkvoltage is applied to one of the first pixel electrode and the secondpixel electrode from the data line, wherein the other one of the firstactive device and the second active device is turned off at the(n+1)^(th) frame time.

The disclosure still directs to a pixel array including a plurality ofpixel structures arranged in an array. Each of the pixel structuresincludes a first scan line, a second scan line, a first common electrodeline, a first data line, a second data line, a first active device, asecond active device, a third active device, a first pixel electrode, asecond pixel electrode, and a third pixel electrode. The first and thesecond data lines intersect with the first and the second scan lines.The first active device is driven by the first scan line andelectrically connected to the first data line. The second active deviceis driven by the second scan line. The third active device is driven bythe first scan line and electrically connected to the second data line.The first pixel electrode is electrically connected to the first dataline through the first active device. The second pixel electrode iselectrically connected to the first data line through the first activedevice. The third pixel electrode is electrically connected to thesecond data line through the third active device, wherein the firstpixel electrode is located between the second pixel electrode and thethird pixel electrode.

In view of the above, the pixel structure according to the disclosure isconfigured with two or three pixel electrodes arranged in parallel,wherein at least one of the pixel electrodes displays the dark image inthe 3D display mode. Accordingly, the pixel electrode displaying thedark image is served as the light shielding pattern between two adjacentpixel structures in the 3D display mode, such that the problem of crosstalk between stereo images can be prevented. In addition, when the pixelstructure has three pixel electrodes, the two pixel electrodes which donot display the dark image can have different display voltages in the 3Ddisplay mode. Thereby, the pixel structure having three pixel electrodescan have high resolution in the 3D display mode or can be prevented fromthe problems of color shift and color washout at large view angle.Furthermore, all pixel electrodes in the pixel structure can display thecorresponding gray levels in the 2D display mode so that desirabledisplay aperture is provided. Namely, the pixel structure according tothe invention can have desirable display aperture in the 2D display modeand desirable display effect in the 3D display mode.

In order to make the aforementioned and other features and advantages ofthe disclosure more comprehensible, embodiments accompanying figures aredescribed in detail below.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings are included to provide further understanding,and are incorporated in and constitute a part of this specification. Thedrawings illustrate exemplary embodiments and, together with thedescription, serve to explain the principles of the disclosure.

FIG. 1 is the 3D display technique.

FIG. 2 is a schematic view of a pixel structure according to a firstembodiment.

FIG. 3 is an equivalent circuit diagram of the pixel structure in FIG.2.

FIG. 4 is the driving waveform diagrams of the first scan line and thesecond scan line of the pixel structure in FIG. 2 in the 2D display modeand the 3D display mode.

FIG. 5 is a schematic view of a pixel structure according to a secondembodiment.

FIG. 6 is an equivalent circuit diagram of the pixel structure in FIG.5.

FIG. 7A is the driving waveform diagram of the scan line of the pixelstructure in FIG. 5 in a first 2D display mode.

FIG. 7B is the driving waveform diagram of the scan line of the pixelstructure in FIG. 5 in a second 2D display mode.

FIG. 8 is the driving waveform diagram of the scan line of the pixelstructure in FIG. 5 in a 3D display mode.

FIG. 9 is a schematic view of a pixel structure according to a thirdembodiment.

FIG. 10 is the driving waveform diagrams of the first scan line and thesecond scan line of the pixel structure in FIG. 9 in a 2D display mode.

FIG. 11A is the driving waveform diagrams of the first scan line and thesecond scan line of the pixel structure in FIG. 9 in a first 3D displaymode.

FIG. 11B is the driving waveform diagrams of the first scan line and thesecond scan line of the pixel structure in FIG. 9 in a second 3D displaymode.

FIG. 12 is a schematic view of a pixel structure according to a fourthembodiment.

FIG. 13 is an equivalent circuit diagram of the pixel structure 500.

FIG. 14 is a schematic view of a pixel structure according to a fifthembodiment.

FIG. 15 is a schematic view of two adjacent pixel structures in a pixelarray according to a sixth embodiment.

DESCRIPTION OF EMBODIMENTS

FIG. 2 is a schematic view of a pixel structure according to a firstembodiment. Referring to FIG. 2, the pixel structure 200 includes afirst scan line 210, a second scan line 220, a first common electrodeline 230, a data line 240, a first active device 250, a second activedevice 260, a first pixel electrode 270, and a second pixel electrode280. The data line 240 intersects with the first and the second scanlines 210 and 220. The first active device 250 is driven by the firstscan line 210 and electrically connected to the data line 240. Thesecond active device 260 is driven by the second scan line 220 andelectrically connected to the first common electrode line 230. The firstpixel electrode 270 is electrically connected to the data line 240through the first active device 250. The second pixel electrode 280 iselectrically connected to the data line 240 through the first activedevice 250 and electrically connected to the first common electrode line230 through the second active device 260.

FIG. 3 illustrates an equivalent circuit diagram of the pixel structurein FIG. 2. Referring to FIG. 2 and FIG. 3 simultaneously, when the pixelstructure 200 is applied in a liquid crystal display panel, the firstpixel electrode 270 and the opposite electrode configured in the liquidcrystal display panel construct the liquid crystal capacitance Clc1, andthe second pixel electrode 280 and the opposite electrode configured inthe liquid crystal display panel construct another liquid crystalcapacitance Clc2. In the design of the structure, the first commonelectrode line 230 overlaps the second pixel electrode 280 to form thestorage capacitance Cs2. In addition, the pixel structure 200 furtherincludes a second common electrode line 290 which overlaps the firstpixel electrode 270 to form another storage capacitance Cs1. The firstcommon electrode line 230 and the second common electrode line 290 canbe connected to a same voltage such as a common voltage, so that thefirst common electrode line 230 and the second common electrode line 290are represented by the same line in FIG. 3.

In addition, the first common electrode line 230 has a main trunk 232and a branch 234. The main trunk 232 is substantially parallel to thefirst scan line 210 and connected with the branch 234 to form a cross.The second active device 260 is connected with a terminal of the branch234. The second common electrode line 290 can also have a main trunk 292and a branch 294, wherein the main trunk 292 is substantially parallelto the first scan line 210 and connected with the branch 294 to formanother cross.

Specifically, in an alternative embodiment, the first common electrodeline 230 and the second common electrode line 290 can be respectivelyformed by a fence pattern (having a main trunk and a plurality ofbranches intersected with the main trunk), a U shape pattern(surrounding the periphery of the pixel electrode), or other patterns.The above-mentioned cross as shown in FIG. 2 is only exemplary and notintended to limit the present invention.

Furthermore, for electrically connecting the second active device 260 tothe first common electrode line 230, the pixel structure 200 in thepresent embodiment is configured with a transparent connecting layer 262which connects the source of the second active device 260 and the firstcommon electrode line 230 through the through holes TH1 and TH2.Nevertheless, the present invention should not be construed as limitedto the embodiments set forth herein. Any connection method capable ofelectrically connecting the second active device 260 to the first commonelectrode line 230 can be applied in the invention. Additionally, asshown in FIG. 2, the first active device 250 can be a dual drain thinfilm transistor, and the two drains of the first active device 250 canbe respectively electrically connected to the first pixel electrode 270and the second pixel electrode 280. However, as shown in FIG. 3, thepixel structure 200 can use two transistors 252 and 254 to connect thefirst pixel electrode 270 and the second pixel electrode 280 to the dataline 240, respectively. Herein, the two transistors 252 and 254 arecontrolled by the first scan line 210 and connected with the data line240.

In the present embodiment, the first pixel electrode 270 is locatedbetween the second pixel electrode 280 and a second pixel electrode 280of a previous or a next pixel structure 200. In addition, the first scanline 210 and the second scan line 220 can be disposed between the firstpixel electrode 270 and the second pixel electrode 280. Namely, thefirst pixel electrode 270 and the second pixel electrode 280 can bearranged in parallel to each other in the pixel structure 200.Accordingly, one of the first pixel electrode 270 and the second pixelelectrode 280 displaying a dark image can provide the light shieldingeffect as a light shielding pattern between two adjacent pixelstructures 200. Herein, the pixel structure 200 can have desirable 3Ddisplay effect when performing the 3D display mode, wherein thephenomenon of cross talk between stereo images is not liable occurred.

FIG. 4 illustrates the driving waveform diagrams of the first scan lineand the second scan line of the pixel structure in FIG. 2 in the 2Ddisplay mode and the 3D display mode. Referring to FIG. 2 to FIG. 4, thedriving method of the pixel structure 200 includes, but does not limitto, the following steps. The driving method according to the presentembodiment includes turning on the second active device 260 through thesecond scan line 220 in the 2D display mode, such that a common voltageis applied to the second pixel electrode 280 from the first commonelectrode line 230. Next, the first active device 250 is turned onthrough the first scan line 210 such that a display voltage is appliedto the first pixel electrode 270 and the second pixel electrode 280 fromthe data line 240.

Accordingly, the first pixel electrode 270 is merely applied by thedisplay voltage while the second pixel electrode 280 is applied by thecommon voltage and the display voltage sequentially at the same frametime. The time period the second pixel electrode 280 has the commonvoltage is substantially as short as the enable time period of thesecond scan line 220, so that the user would not feel the displayedimage in the second pixel electrode 280 breaking off when watching theimage displayed by the pixel structure 200. Namely, the image displayedby the first pixel electrode 270 and the second pixel electrode 280 ofthe pixel structure 200 can be continuous in the 2D display mode.

Moreover, in the 3D display mode, the first active device 250 is firstlyturned on by the first scan line 210 and the display voltage is appliedto the first pixel electrode 270 and the second pixel electrode 280 fromthe data line 240 based on the driving method of the pixel structure200. Subsequently, the second active device 260 is turned on through thesecond scan line 220 such that the common voltage is applied to thesecond pixel electrode 280 from the first common electrode line 230.

Accordingly, the first pixel electrode 270 is merely applied by thedisplay voltage while the second pixel electrode 280 is applied by thedisplay voltage and the common voltage sequentially at the same frametime. The time period the second pixel electrode 280 has the displayvoltage is substantially as short as the enable time period of the firstscan line 210, so that the second pixel electrode 280 substantiallycontinuously displays a dark image when the user watches the imagedisplayed by the pixel structure 200. That is to say, the second pixelelectrode 280 does not display the predetermined image in the 3D displaymode. The second pixel electrode 280 is located between the first pixelelectrode 270 and a previous or a next pixel structure 200, so that thesecond pixel electrode 280 can be served as the light shielding patternbetween two pixel structures 200. Herein, the area of the lightshielding pattern is large enough to eliminate the phenomenon of crosstalk between stereo images when the pixel structure 200 performs the 3Ddisplay mode.

In other words, merely modulating the scanning sequence of the scanlines 210 and 220 can the pixel structure 200 have desirable lightshielding effect in the 3D display mode according to the presentembodiment. Additionally, both the first pixel electrode 270 and thesecond pixel electrode 280 of the pixel structure 200 can display thepredetermined image in the 2D display mode, such that the pixelstructure 200 has desirable display aperture ratio in the 2D displaymode. Consequently, the pixel structure 200 not only has good 3D displayeffect, but also has good 2D display quality.

FIG. 5 is a schematic view of a pixel structure according to a secondembodiment and FIG. 6 illustrates an equivalent circuit diagram of thepixel structure in FIG. 5. Referring to FIG. 5 and FIG. 6, the pixelstructure 300 includes a first scan line 312, a second scan line 314, athird scan line 316, a first common electrode line 322, a data line 330,a first active device 342, a second active device 344, a third activedevice 346, a first pixel electrode 352, and a second pixel electrode354. In the present embodiment, the first active device 342 can be adual drain thin film transistor or formed by two transistors 342A and342B as shown in FIG. 6.

The data line 330 intersects with the first, the second, and the thirdscan lines 312, 314, and 316. The first active device 342 is driven bythe first scan line 312 and electrically connected to the data line 330.The second active device 344 is driven by the second scan line 314 andelectrically connected to the first common electrode line 322. The firstpixel electrode 352 is electrically connected to the data line 330through the first active device 342. The second pixel electrode 354 iselectrically connected to the data line 330 through the first activedevice 342 and electrically connected to the first common electrode line322 through the second active device 344. Furthermore, the third activedevice 346 is driven by the third scan line 316, electrically connectedto the first pixel electrode 352, and coupled with the second pixelelectrode 354. In specific, the drain of the third active device 346 iscoupled with the first common electrode line 322 and the second pixelelectrode 354 through the coupling capacitance Cc1 and the couplingcapacitance Cc2, respectively.

The third active device 346 according to the present embodiment isconfigured for redistributing the voltages of the first pixel electrode352 and the second pixel electrode 354, such that the pixel structure300 can have desirable display effect. Herein, the third scan line 316can be a first scan line 312 of a next pixel structure 300 when aplurality of pixel structures 300 forms a pixel array. Based on thelayout of the pixel structure 300, the display voltage transmitted bythe data line 330 can be applied to the first pixel electrode 352 andthe second pixel electrode 354 after the first active device 342 isturned on by the first scan line 312. Thereafter, the first scan line312 of the next pixel structure 300, i.e. the third scan line 316, isenabled to turn on the third active device 346 so that the voltages ofthe first pixel electrode 352 and the second pixel electrode 354 areredistributed. According to the display method, the pixel structure 300can have desirable display quality.

In the present embodiment, the pixel structure 300 further includes asecond common electrode line 324 which overlaps the first pixelelectrode 352 to form the storage capacitance Cs1. The second pixelelectrode 354 overlaps the first common electrode line 322 to formanother storage capacitance Cs2. In addition, when the pixel structure300 is applied in a liquid crystal display panel, the first pixelelectrode 352 and the opposite electrode configured in the liquidcrystal display panel construct the liquid crystal capacitance Clc1, andthe second pixel electrode 354 and the opposite electrode configured inthe liquid crystal display panel construct another liquid crystalcapacitance Clc2.

As shown in FIG. 5, the second pixel electrode 354 is located betweenthe second scan line 314 and the first pixel electrode 352, and thesecond scan line 314 is located between the second pixel electrode 354and the first scan line 312. The second pixel electrode 354 is locatedbetween the first pixel electrode 352 and a first pixel electrode 352 ofa previous or next pixel structure 300. In other words, the first pixelelectrode 352 and the second pixel electrode 354 are arranged inparallel in the present embodiment.

FIG. 7A illustrates the driving waveform diagram of the scan line of thepixel structure in FIG. 5 in a first 2D display mode and FIG. 7Billustrates the driving waveform diagram of the scan line of the pixelstructure in FIG. 5 in a second 2D display mode. FIG. 8 illustrates thedriving waveform diagram of the scan line of the pixel structure in FIG.5 in a 3D display mode. Referring to FIGS. 5, 6, and 7A, the drivingmethod of the pixel structure 300 in the first 2D display mode includesturning on the second active device 344 through the second scan line314, such that a common voltage is applied to the second pixel electrode354 from the first common electrode line 322. Next, the first activedevice 342 is turned on through the first scan line 312, such that adisplay voltage is applied to the first pixel electrode 352 and thesecond pixel electrode 354 from the data line 330. Now, the second pixelelectrode 354 can have the display voltage rather than the commonvoltage. Thereafter, the third active device 346 is turned on by thethird scan line 316, so that the voltages of the first pixel electrode352 and the second pixel electrode 354 are redistributed.

In the first 2D display mode, the driving method of the pixel structure300 can include enabling the second scan line 314, the first scan line312, and the third scan line 316 sequentially. Accordingly, the secondpixel electrode 314 is though applied by the common voltage and thedisplay voltage in turn, the time period the second pixel electrode 314has the common voltage is quite short, as short as the enable timeperiod of the second scan line 314, and thus the second pixel electrode354 can display the predetermined image, but not the dark image. Namely,the first pixel electrode 352 and the second pixel electrode 354 bothprovide the image display function when the user watches the imagedisplayed by the pixel structure 300.

Alternatively, referring to FIGS. 5, 6, and 7B, the second scan line 314is not enabled according to the driving method of the pixel structure300 in the second 2D display mode. That is to say, merely enabling thefirst scan line 312 and the third scan line 316 can the 2D displayfunction be performed according to the present embodiment. Specifically,the first scan line 312 is firstly enabled so that the display voltagetransmitted by the data line 330 can be applied to the first pixelelectrode 352 and the second pixel electrode 354, and then the thirdscan line 316 is enabled so that the voltages of the first pixelelectrode 352 and the second pixel electrode 354 can be redistributed.

Moreover, referring to FIGS. 5, 6, and 8, the first active device 342 isfirstly turned on by the first scan line 312 and the display voltage isapplied to the first pixel electrode 352 and the second pixel electrode354 from the data line 330 according to the driving method of the pixelstructure 300 in the 3D display mode. Next, the third active device 346is turned on by the third scan line 316, so that the voltages of thefirst pixel electrode 352 and the second pixel electrode 354 areredistributed. Subsequently, the second active device 344 is turned onby the second scan line 314 such that the common voltage is applied tothe second pixel electrode 354 from the first common electrode line 322.

Therefore, the first pixel electrode 352 is first applied by the displayvoltage and subsequently coupled with the display voltage of the secondpixel electrode 354. The second pixel electrode 354 is first applied bythe display voltage, subsequently coupled with the display voltage ofthe first pixel electrode 352, and then applied by the common voltage.Under the driving method, the first pixel electrode 352 continuouslydisplays the predetermined image at a frame time, while the second pixelelectrode 354 is applied by the display voltage only at a short timeperiod of the frame time and applied by the common voltage at the othertime period of the frame time. Accordingly, the second pixel electrode354 substantially displays the dark image.

As a whole, the first pixel electrode 352 displays the predeterminedimage and the second pixel electrode 352 does not display thepredetermined image in the 3D display mode. It is noted that the secondpixel electrode 354 is located between the first pixel electrode 352 andthe next or the previous pixel structure 300. Therefore, the secondpixel electrode 354 can be served as a light shielding pattern in the 3Ddisplay mode to prevent from the occurrence of cross talk between stereoimages. Additionally, the first pixel electrode 352 and the second pixelelectrode 354 of the pixel structure 300 can both display thepredetermined image in the 2D display mode, such that the pixelstructure 300 has desirable display aperture ratio in the 2D displaymode.

FIG. 9 is a schematic view of a pixel structure according to a thirdembodiment. Referring to FIG. 9, the pixel structure 400 includes afirst scan line 412, a second scan line 414, a data line 420, a firstactive device 432, a second active device 434, a first pixel electrode452, and a second pixel electrode 454. The data line 420 intersects withthe first and the second scan lines 412 and 414. The first active device432 is driven by the first scan line 412 and electrically connected tothe data line 420. The second active device 434 is driven by the secondscan line 414 and electrically connected to the data line 420. The firstpixel electrode 452 is electrically connected to the data line 420through the first active device 432 and the second pixel electrode 454is electrically connected to the data line 420 through the second activedevice 434.

The first pixel electrode 452 and the second pixel electrode 454 in thepixel structure 400 are connected to the data line 420 through differentactive device 432 and 434, and the first active device 432 and thesecond active device 434 are controlled by different scan lines 412 and414. Hence, the first pixel electrode 452 and the second pixel electrode454 can have different display voltages. In the present embodiment, thepixel structure 400 further includes a first common electrode line 462and a second common electrode line 464 which respectively overlap thefirst pixel electrode 452 and the second pixel electrode 454 to form therequired storage capacitance.

FIG. 10 illustrates the driving waveform diagrams of the first scan lineand the second scan line of the pixel structure in FIG. 9 in a 2Ddisplay mode. Referring to FIG. 9 and FIG. 10, the first active device432 and the second active device 434 are turned on simultaneously by thefirst scan line 412 and the second scan line 414 in the 2D display modeaccording to the driving method of the pixel structure 400 so that thedisplay voltage is applied to the first pixel electrode 452 and thesecond pixel electrode 454 from the data line 420. Namely, the firstscan line 412 and the second scan line 414 are simultaneously enabled inthe 2D display mode of the pixel structure 400, and the first pixelelectrode 452 and the second pixel electrode 454 both display thepredetermined image.

FIG. 11A illustrates the driving waveform diagrams of the first scanline and the second scan line of the pixel structure in FIG. 9 in afirst 3D display mode. Referring to FIG. 9 and FIG. 11A, the firstactive device 432 and the second active device 434 are turned on by thefirst scan line 412 and the second scan line 414 at the n^(th) frametime in the first 3D display mode according to the driving method of thepixel structure 400 so that the display voltage is applied to the firstpixel electrode 452 and the second pixel electrode 454 from the dataline 420. Moreover, one of the first scan line 412 and the second scanline 414 is enabled at the (n+1)^(th) frame time. In the presentembodiment, the first scan line 412 is, for example, enabled at the(n+1)^(th) frame time. Accordingly, the first active device 432 isturned on at the (n+1)^(th) frame time so that a dark voltage is appliedto the first pixel electrode 452 from the data line 420 while the secondactive device 434 is not turned on, wherein the dark voltage can be acommon voltage or a grounding voltage.

Namely, the first pixel electrode 452 in the pixel structure 400 candisplay the dark image and the second pixel electrode 454 displays thepredetermined image in the first 3D display mode. As such, the firstpixel electrode 452 can be served as the light shielding pattern toprevent from the occurrence of cross talk of stereo images. It is notedthat the driving method of the pixel structure 400 which merely turns onthe first active device 432 at the (n+1)^(th) frame time in the first 3Ddisplay mode is taken as an example, but the invention is not limitedthereto.

Additionally, the first pixel electrode 452 and the second pixelelectrode 454 have a first refresh frequency in the 2D display modeaccording to the driving method of the pixel structure 400, forinstance. In the first 3D display mode, the first pixel electrode 452also has the first refresh frequency and the second pixel electrode 454has a second refresh frequency, wherein the first refresh frequency istwice of the second refresh frequency. In other words, the refreshfrequency of the second pixel electrode 454 is half of the refreshfrequency of the first pixel electrode 452 in the first 3D display mode.

FIG. 11B illustrates the driving waveform diagrams of the first scanline and the second scan line of the pixel structure in FIG. 9 in asecond 3D display mode. Referring to FIG. 9 and FIG. 11B, the firstactive device 432 and the second active device 434 are turned on by thefirst scan line 412 and the second scan line 414 at the n^(th) frametime in the second 3D display mode according to the driving method ofthe pixel structure 400 so that the display voltage is applied to thefirst pixel electrode 452 and the second pixel electrode 454 from thedata line 420. Moreover, only the second active device 434 is turned onat the (n+1)^(th) frame time. Now, the dark voltage transmitted by thedata line 420 is applied to the second pixel electrode 454 through thesecond active device 434 so that the second pixel electrode 454 displaysthe dark image, wherein the dark voltage can be the common voltage orthe grounding voltage.

The first pixel electrode 452 and the second pixel electrode 454 have afirst refresh frequency in the 2D display mode according to the drivingmethod of the pixel structure 400, for instance. In the second 3Ddisplay mode, the second pixel electrode 454 also has the first refreshfrequency and the first pixel electrode 452 has the second refreshfrequency, wherein the first refresh frequency is twice of the secondrefresh frequency. In other words, the refresh frequency of the firstpixel electrode 452 is half of the refresh frequency of the second pixelelectrode 454 in the second 3D display mode.

Based on the first and the second 3D display modes, merely one of thefirst scan line 412 and the second scan line 414 can be selectivelyenabled at the (n+1)^(th) frame time according to the 3D display mode ofthe pixel structure 400, such that merely one of the first active device432 and the second active device 434 can be turned on. Herein, the darkvoltage transmitted by the data line 420 can be applied to merely one ofthe first pixel electrode 452 and the second pixel electrode 454.Moreover, the other of the first active device 432 and the second activedevice 434 is not turned on at the (n+1)^(th) frame time. Accordingly,the one of the pixel electrode 452 and the second pixel electrode 454applied by the dark voltage can display the dark image to be served asthe light shielding pattern to achieve the driving method of the presentembodiment.

FIG. 12 is a schematic view of a pixel structure according to a fourthembodiment. Referring to FIG. 12, the pixel structure 500 includes afirst scan line 512, a second scan line 514, a first data line 522, asecond data line 524, a first active device 532, a second active device534, a third active device 536, a first pixel electrode 552, a secondpixel electrode 554, a third pixel electrode 556, a first commonelectrode line 562, and a second common electrode line 564.

The first and the second data lines 522 and 524 intersect with the firstand the second scan lines 512 and 514. The first active device 532 isdriven by the first scan line 512 and electrically connected to thefirst data line 522. The second active device 534 is driven by thesecond scan line 514 and electrically connected to the first commonelectrode line 562. The third active device 536 is also driven by thefirst scan line 512 and electrically connected to the second data line524. The first pixel electrode 552 is electrically connected to thefirst data line 522 through the first active device 532. The secondpixel electrode 524 is also electrically connected to the first dataline 522 through the first active device 532 and electrically connectedto the first common electrode line 562 through the second active device534. The third pixel electrode 556 is electrically connected to thesecond data line 524 through the third active device 536.

The first pixel electrode 552, the second pixel electrode 554, and thethird pixel electrode 556 are located between the first data line 522and the second data line 524. The first pixel electrode 552 is locatedbetween the second pixel electrode 554 and the third pixel electrode556. In addition, the first scan line 512 is located between the firstpixel electrode 552 and the third pixel electrode 556, and the secondscan line 514 is located at a side of the second pixel electrode 554away from the first pixel electrode 552. For forming the requiredstorage capacitance, the first common electrode line 562 overlaps thefirst pixel electrode 552 and the second pixel electrode 554 and thesecond common electrode line 564 overlaps the third pixel electrode 556,for instance. Furthermore, for connecting the second pixel electrode 554with the first active device 532, the second pixel electrode 554 can hastwo extending portions 554A extending towards the first scan line 512,wherein the two extending portions 554A are respectively located betweenthe first pixel electrode 552 and the first data line 522 and betweenthe first pixel electrode 552 and the second data line 524.

FIG. 13 illustrates an equivalent circuit diagram of the pixel structure500. Referring to FIG. 12 and FIG. 13, the first active device 532 asshown in FIG. 13 is divided into the first transistor T1 and the secondtransistor T2, but the first active device 532 can be formed by a dualdrain thin film transistor in other embodiments. The first pixelelectrode 552 is electrically connected to the first data line 522through the control of the first active device 532. The second pixelelectrode 554 is electrically connected to the first data line 522 orthe first common electrode line 562 through the control of the firstactive device 532 and the control of the second active device 534. Thethird pixel electrode 556 is electrically connected to the second dataline 524 through the control of the third active device 536.

Accordingly, the voltage of the first pixel electrode 552 can be thevoltage transmitted by the first data line 522, the voltage of thesecond pixel electrode 554 can be the voltage transmitted by the firstdata line 522 or the voltage transmitted by the first common electrodeline 562, and the voltage of the third pixel electrode 556 can be thevoltage transmitted by the second data line 524. Similar to theaforesaid embodiment, the first pixel electrode 552 and the second pixelelectrode 554 can have the same voltage or different voltages, whereinthe second pixel electrode 554 can be used for displaying the dark imagewhen the first pixel electrode 552 and the second pixel electrode 554have different voltages. The display voltage of the third pixelelectrode 556 can be the same to or different from the voltages of theother two pixel electrodes or the same to the voltage of one of theother two pixel electrodes. During the 2D display mode of the pixelstructure 500, the first pixel electrode 552, the second pixel electrode554, and the third pixel electrode 556 can display the predeterminedimages. During the 3D display mode, the second pixel electrode 554 candisplay the dark image and the third pixel electrode 556 can selectivelydisplay the predetermined image or the dark image.

During the 2D display mode, the second active device 534 is turned on bythe second scan line 514 first such that the second pixel electrode 554is applied by the voltage transmitted by the first common electrode line562. Next, the first scan line 512 is enabled to turn on the firstactive device 532 and the third active device 536. Herein, the displayvoltage transmitted by the first data line 522 can be simultaneouslyapplied to the first pixel electrode 552 and the second pixel electrode554, and the display voltage transmitted by the second data line 524 canbe applied to the third pixel electrode 556. Hence, the first pixelelectrode 552, the second pixel electrode 554, and the third pixelelectrode 556 can display the predetermined images in the 2D displaymode. It is noted that the voltages transmitted by the first data line522 and the second data line 524 can be different. Accordingly, in the2D display mode of the pixel structure 500, one pixel structure 500 candisplay two or more gray levels to eliminate the problems of gray scaleinversion, color shift, or color washout at large view angle.

The adjacent two rows of the pixel structures 500 in the display panelare used for respectively displaying the left eye image and the righteye image when the pixel structure 500 is applied in the display panelperforming the 3D display mode. The positions of the two rows of thepixel structures 500 are close so that the left eye and the right eye ofthe user may easily receive two images, i.e. the left eye image and theright eye image, simultaneously, which causes the problem of cross talkbetween stereo images. Therefore, at least one of the second pixelelectrode 554 and the third pixel electrode 556 can selectively displaythe dark image in the present embodiment, which conduce to preventingfrom the phenomenon of the cross talk of stereo images.

In specific, the first active device 532 and the third active device 536are turned on by the first scan line 512 in the 3D display mode. Herein,the first display voltage transmitted by the first data line 522 can beapplied to the first pixel electrode 552 and the second pixel electrode554. Also, the voltage transmitted by the second data line 524 can beapplied to the third pixel electrode 556. If the second data line 524transmits the dark voltage, the third pixel electrode 556 can displaythe dark image. If the second data line 524 transmits the second displayvoltage rather than the dark voltage, the third pixel electrode 556 candisplay the predetermined image. Next, the second active device 534 isturned on by the second scan line 512. Herein, the second pixelelectrode 554 originally applied by the first display voltage iselectrically connected to the first common electrode line 562 to havethe common voltage. Accordingly, the image displayed by the second pixelelectrode 554 is the dark image.

Owing that the second pixel electrode 554 and the third pixel electrode556 are located at the periphery of the pixel structure 500, the secondpixel electrode 554 and the third pixel electrode 556 both displayingthe dark image can provide the light shielding effect between twoadjacent rows of the pixel structures 500. Accordingly, the user wouldnot feel cross talk between stereo images caused by the interferencebetween the left eye image and the right eye image, which facilitatesthe improvement of the 3D display effect. The second pixel electrodes554 in each row of the pixel structures 500 is adjacent to the thirdpixel electrodes 556 in the previous or the next row of the pixelstructures 500 when the pixel structures 500 having similar layout arearranged in an array. The second pixel electrodes 554 and the thirdpixel electrodes 556 can form a dark region with large area when thesecond pixel electrodes 554 and the third pixel electrodes 556simultaneously display the dark image, which is further conducive topreventing cross talk between stereo images caused by the interferencebetween the left eye image and the right eye image.

Certainly, the third pixel electrode 556 is not limited to display thedark image in the present embodiment. In one embodiment, the second dataline 524 can transmit a second display voltage when the first scan line512 is enabled. Therefore, the third pixel electrode 556 can display thepredetermined image. Owing that the first pixel electrode 552 and thethird pixel electrode 556 can receive the display voltages transmittedby the first data line 522 and the second data line 524 and the displayvoltages transmitted by the first data line 522 and the second data line524 can be different, the resolution of the display panel applying thepixel structure 500 in the 3D display mode can be improved.

For example, in a conventional design, the even rows of the pixelstructures and the odd rows of the pixel structures in the display panelare used for displaying the left eye image and the right eye imagerespectively with respect to the design of the patterned retarder forachieving the 3D display effect, and vice versa. Therefore, in a displaypanel having 1,080 rows of pixel structures, merely 540 rows of thepixel structures display the left eye image and the other 540 rows ofthe pixel structures display the right eye image. That is to say, theresolution of the 3D image is half of the design of the display panel.

Nevertheless, in the present embodiment, the first pixel electrode 552and the third pixel electrode 556 in the same pixel structure 500 candisplay alternative gray levels, i.e. have different display voltage, inthe 3D display mode. When the pixel structure 500 is used for displayingthe left eye image, the first pixel electrode 552 and the third pixelelectrode 556 can respectively display the left eye image of the n^(th)row and the left eye image of the (n+1)^(th) row. Similarly, the pixelstructure 500 can display the right eye image of the n^(th) row and theright eye image of the (n+1)^(th) row when it is used for displaying theright eye image. As such, when the pixel structure 500 is applied in adisplay panel having 1080 rows of pixel structures, the left eye imageand the right eye image in the 3D display mode can have the resolutionof 1,080 rows. That is to say, the resolution is not reduced in the 3Ddisplay mode.

Furthermore, the first pixel electrode 552 and the third pixel electrode556 in the same pixel structure 550 can display the images withdifferent gray levels, i.e. have different display voltages, in the 3Ddisplay mode. The design of the present embodiment can selectivelyimprove the display effect of the 3D display mode. For example, onepixel structure 500 can display one image with different gray levels,which facilitates to improve the problems of color shift, color washout,and the like at large view angle. Consequently, the application of thepixel structure 500 in the display panel is conducive to the enhancementof the display effect in the 3D display mode.

FIG. 14 is a schematic view of a pixel structure according to a fifthembodiment. Referring to FIG. 14, the components configured in the pixelstructure 600 is substantially identical to those configured in thepixel structure 500, and the equivalent circuit diagram of the pixelstructure 600 can be referred to that shown in FIG. 13. The differencebetween the present embodiment and the fourth embodiment mainly lies inthat the relative positions of the components. In the pixel structure600, the first scan line 512 is located between the first pixelelectrode 552 and the second pixel electrode 554, and the third pixelelectrode 556 is located at a side of the first pixel electrode 552 awayfrom the first scan line 512. In addition, the first common electrodeline 562 merely overlaps the second pixel electrode 554, and the secondcommon electrode line 564 simultaneously overlaps the first pixelelectrode 552 and the third pixel electrode 556.

Similar to the fourth embodiment, the first pixel electrode 552, thesecond pixel electrode 554, and the third pixel electrode 556 candisplay the predetermined images in the 2D display mode. Furthermore,the displayed gray level of the third pixel electrode 556 can bedifferent from those of the first pixel electrode 552 and the secondpixel electrode 554, thereby the problems of the gray scale inversion,the color shift, and the color washout at large view angle can beimproved.

In the 3D display mode, the driving method of the pixel structure 600 issimilar to that of the pixel structure 500 and is not iterated here.Accordingly, at least one of the second pixel electrode 554 and thethird pixel electrode 556 can display the dark image so as to preventfrom the interference between the left eye image and the right eyeimage. Namely, cross talk between stereo images can be improved.

Furthermore, the first pixel electrode 552 and the third pixel electrode556 can have different display voltages in the 3D display mode. Thedisplayed gray level of the third pixel electrode 556 can be differentfrom that of the first pixel electrode 552 when the same imageinformation is displayed, thereby the problems of the gray scaleinversion, the color shift, and the color washout at large view anglecan be reduced in the pixel structure 600. The image informationdisplayed by the third pixel electrode 556 can be different from thatdisplayed by the first pixel electrode 552, thereby the resolution ofthe display panel having the pixel structure 600 can be enhanced in the3D display mode.

FIG. 15 is a schematic view of two adjacent pixel structures in a pixelarray according to a sixth embodiment. Referring to FIG. 15, the pixelstructure 700 and 700′ are similar to the pixel structure 600. Thisembodiment is similar to the fifth embodiment, while the differencetherebetween lies the dispositions of the first common electrode line562A and 562B and the second common electrode line 564 and theconnection of the second active device 534 and other components. In thepresent embodiment, the first common electrode line 562A overlaps thefirst pixel electrode 552 and the third pixel electrode 556, and thesecond common electrode line 564 overlaps the second pixel electrode554. In addition, when a plurality of pixel structures 700 and 700′ isarranged in an array to form a pixel array, the second active device 534of the pixel structure 700 in the present embodiment is connected withthe first common electrode line 562B of the previous or the next pixelstructure 700′. In specific, two pixel structures 700 and 700′ are shownto represent the pixel array in the present embodiment. However, personswho have ordinary skill in the art know that the pixel array can beformed by repeatedly arranging the pixel structures as shown in FIG. 7in the row direction.

In the present embodiment, the second pixel electrode 554 can beelectrically connected to the first common electrode line 562Bconfigured in the previous or the next pixel structure 700′ through thesecond active device 534, rather than connected to the second commonelectrode line 564 overlapping the second pixel electrode 554 itself.The first common electrode line 562B configured in the previous or thenext pixel structure 700′ overlaps the third pixel electrode 556′ in thepixel structure 700′ and further overlaps the first pixel electrode (notshown) of the pixel structure 700′ to form the required storagecapacitance. Similarly, the first common electrode line 562A overlappingthe first pixel electrode 552 and the third pixel electrode 556 in thepixel structure 700 can be connected to the second pixel electrode ofthe adjacent pixel structure (not shown) through the correspondingactive device (not marked). As such, the voltage in the second commonelectrode line 564 would not fluctuate due to the uneven current whenthe second electrode 554 is electrically connected to the first commonelectrode line 562B. Accordingly, the pixel structure 700 not only hasthe advantages of the pixel structure 600, but also has more stabledisplay quality because the second pixel electrode 554 is not connectedto the second common electrode line 564 overlapping the second pixelelectrode 554 itself.

In light of the foregoing, the two pixel electrodes or the three pixelelectrodes in the pixel structure according to the invention is drivenby different active devices, such that the pixel electrodes can beapplied by different voltages. In the 3D display mode, one pixelelectrode in the pixel structure can display the dark image to be servedas the light shielding pattern. In the 2D display mode, all the pixelelectrodes can display the predetermined images. Accordingly, the areaof the light shielding pattern is large enough to prevent from crosstalk between stereo images of the pixel structure in the 3D displaymode, and the pixel structure can have desirable display quality in 2Ddisplay mode because all the pixel electrodes can display thepredetermined image. That is to say, the 2D display effect is notsacrificed for achieving desirable 3D display effect according to theinvention. In addition, when the pixel structure has three pixelelectrodes, the two pixel electrodes which do not display the dark imagecan have different display voltages in the 3D display mode. Accordingly,the 3D display resolution can be enhanced when the pixel structureaccording to the invention is applied to the display panel forperforming the 3D display mode. On the other hand, the situations suchas color shift and color washout at large angle in the 3D display modecan be improved.

It will be apparent to those skilled in the art that variousmodifications and variations can be made to the structure of theinvention without departing from the scope or spirit of the invention.In view of the foregoing, it is intended that the invention covermodifications and variations of this invention provided they fall withinthe scope of the following claims and their equivalents.

What is claimed is:
 1. A pixel structure, comprising: a first scan line;a second scan line; a first common electrode line having a main trunkand a branch; a first data line intersecting with the first and thesecond scan lines; a first active device driven by the first scan lineand electrically connected to the first data line; a second activedevice driven by the second scan line and electrically connected to thefirst common electrode line; a first pixel electrode electricallyconnected to the first data line through the first active device; and asecond pixel electrode electrically connected to the first data linethrough the first active device and electrically connected to the firstcommon electrode line through the second active device.
 2. The pixelstructure as claimed in claim 1, wherein the first pixel electrode islocated between the second pixel electrode and a second pixel electrodeof a previous or a next pixel structure.
 3. The pixel structure asclaimed in claim 1, wherein the first scan line and the second scan lineare located between the first pixel electrode and the second pixelelectrode.
 4. The pixel structure as claimed in claim 1, wherein thefirst common electrode line overlaps the second pixel electrode.
 5. Thepixel structure as claimed in claim 4, wherein the main trunk issubstantially parallel to the first scan line and connected with thebranch, and the second active device is connected with a terminal of thebranch.
 6. The pixel structure as claimed in claim 1, further comprisinga second common electrode line overlapping the first pixel electrode. 7.The pixel structure as claimed in claim 1, further comprising a thirdscan line and a third active device, the third active device is drivenby the third scan line, and the third active device is electricallyconnected to the first pixel electrode and coupled with the second pixelelectrode.
 8. The pixel structure as claimed in claim 7, wherein thethird scan line is a first scan line of a next pixel structure.
 9. Thepixel structure as claimed in claim 1, further comprising a second dataline, a third active device, and a third pixel electrode, the thirdactive device is driven by the first scan line and connected between thesecond data line and the third pixel electrode, and the first pixelelectrode, the second pixel electrode, and the third pixel electrode arelocated between the first data line and the second data line.
 10. Thepixel structure as claimed in claim 9, wherein the first pixel electrodeand the second pixel electrode are located between the first scan lineand the second scan line, the first pixel electrode is located betweenthe second pixel electrode and the first scan line, and the third pixelelectrode and the first pixel electrode are located at two oppositesides of the first scan line.
 11. The pixel structure as claimed inclaim 10, wherein the second pixel electrode has two extending portions,the two extending portions extends toward the first scan line, and thetwo extending portions are respectively located between the first pixelelectrode and the first data line and between first pixel electrode andthe second data line.
 12. The pixel structure as claimed in claim 10,wherein the first common electrode line overlaps the first pixelelectrode and the second pixel electrode.
 13. The pixel structure asclaimed in claim 10, further comprising a second common electrode lineoverlapping the third pixel electrode.
 14. The pixel structure asclaimed in claim 9, wherein the first pixel electrode and the secondpixel electrode are respectively located at two opposite sides of thefirst scan line, the first pixel electrode is located between the thirdpixel electrode and the first scan line, and the second pixel electrodeis located between the first scan line and the second scan line.
 15. Thepixel structure as claimed in claim 14, wherein the first commonelectrode line overlaps the second pixel electrode.
 16. The pixelstructure as claimed in claim 14, further comprising a second commonelectrode line overlapping the first pixel electrode and the third pixelelectrode.
 17. A pixel array, comprising a plurality of pixel structuresarranged in an array, and each of the pixel structures comprising: afirst scan line; a second scan line; a first common electrode line atleast partially parallel to the first scan line and the second scanline; a first data line intersecting with the first and the second scanlines; a second data line intersecting with the first and the secondscan lines; a first active device driven by the first scan line andelectrically connected to the first data line; a second active devicedriven by the second scan line; a third active device driven by thefirst scan line and electrically connected to the second data line; afirst pixel electrode electrically connected to the first data linethrough the first active device; a second pixel electrode electricallyconnected to the first data line through the first active device; and athird pixel electrode electrically connected to the second data linethrough the third active device, wherein the first pixel electrode islocated between the second pixel electrode and the third pixelelectrode.
 18. The pixel array as claimed in claim 17, wherein thesecond active device is connected to the second pixel electrode and thefirst common electrode line such that the second pixel electrode iselectrically connected to the first common electrode line through thesecond active device.
 19. The pixel array as claimed in claim 18,wherein the first common electrode line overlaps the first pixelelectrode and the second pixel electrode.
 20. The pixel array as claimedin claim 19, further comprising a second common electrode lineoverlapping the third pixel electrode.
 21. The pixel array as claimed inclaim 17, wherein the first common electrode line overlaps the secondpixel electrode.
 22. The pixel array as claimed in claim 21, furthercomprising a second common electrode line overlapping the first pixelelectrode and the third pixel electrode.
 23. The pixel array as claimedin claim 17, further comprising a second common electrode line, thefirst common electrode line overlapping the first pixel electrode andthe third pixel electrode, the second common electrode line overlappingthe second pixel electrode, and the second pixel electrode beingelectrically connected to a first common electrode line of a previous ora next pixel structure through the second active device.